September 17, 2013

• Pre- AP• Correct Who’s Who?• Yeast Lab

Freshwater Food Web

September 17, 2013

• Periods 3 & 4• Make sure you have copied the Freshwater

Food Web into your journal.• Using the food web, complete the Who’s Who

sheet to turn in for a grade!!• Copy 4 Defintions• Game

September 17 2013

• Period 5• Copy the Organisms Graphic Organizer on the

Board• In groups of 3-4 organize the Freshwater

Organism cards into a food web.• In your journal draw the food web using arrows

and the names of the organisms only.• Complete the Who’s Who Sheet to turn in for a

grade!

September 17, 2013

• Period 7• Copy the Graphic Organizer on the Board• Study the Freshwater Food Web into your

journal.• Complete the Who’s Who? Sheet to turn in for

a grade.• Limiting Factors• If time permits: Limiting Factors Game

BIOTIC

• Living resources or components of an ecosystem

ABIOTIC

• Non –Living Resources or Components of an Ecosystem

Examples: Water, light, temperature, air, soil, rocks and wind

LIMITING FACTOR

• Those biotic and abiotic factors that limit the size of a population

COMPETITION

• All living things compete for– Food– Space

• Competition limits population growth

CARRYING CAPACITY

• The total number of organisms supported in a habitat

September 18, 2013 Pre-AP

• In your journal, write a short summary of how food, water and land (shelter) are important components of a habitat. Glue in the graph information.

• You will be assigned a number for a short game we will play.

• You will graph the data from the game.

September 18, 2013

• On your desk is a ½ piece of paper with some of the factors that were presented in the game played yesterday.

• Decide if the factor limited population growth or allowed population growth. (Did you have to go backward or forward?)

• Then decide if the factor was biotic or abiotic.• Check the correct boxes.

Limiting FactorYEAST LAB

• 10 cc Yeast• 10 cc Sugar• 50 mL Water at 40-50 degrees C• Spoon• Cup• Paper Towel

Procedure

1. One person will get supplies2. Set down paper towel on your desk. Place

the yellow cup on top.3. Observe the sugar, then pour into the cup.4. Observe the yeast, then pour into cup. Stir.5. Are there any changes?6. Pour the water into the cup and stir gently.7. Set the cup aside and wait.

YEAST

• Single Celled• Eukaryotic• Fungi• Used to expand in

cooking

ASEXUAL REPRODUCTION

• Parent Cell• Budding• Identical /

Uniform Offspring• No Survival

Advantage

ABIOTIC FACTORS

• Temperature• Space

POST LAB QUESTIONS – answer on handout

• 1. What kind of change occurred when mixing the sugar and yeast?

• 2. What abiotic factors affected the yeast?• 3. What kind of change occurred after adding water?• 4. Will the yeast continue to reproduce forever? Why

or Why Not?• 5. What is an example where two different species

might compete for resources?• 6. What did you learn about how yeast depends on and

may compete for abiotic resources?